Design Con 2015
Breaking News
Comments
Newest First | Oldest First | Threaded View
twk
User Rank
Rookie
re: How to Save Power on LED Drivers for LED Traffic Signs and Message Signs
twk   7/20/2009 8:41:44 AM
NO RATINGS
Great question: Why are there LEDs in the 'dark' area??

Etmax
User Rank
Rookie
re: How to Save Power on LED Drivers for LED Traffic Signs and Message Signs
Etmax   5/27/2009 10:28:27 AM
NO RATINGS
I agree with BVR, why would you have LED's in dark areas unless you are in the business of making drivers and LED's. I don't believe ours do (Australia). A properly designed driver would consume only nanoamps when off though. The snow comment made by MD17 suggests an integral heater that only runs when frosty might offer the best of both worlds.

MD17
User Rank
Rookie
re: How to Save Power on LED Drivers for LED Traffic Signs and Message Signs
MD17   5/22/2009 12:24:15 PM
NO RATINGS
Low Energy Traffic Signals are not always a good thing; Here in the snowy North you can always identify LED based traffic signals-- they are the snow encrusted objects hanging from poles at busy intersections. Depending on the air temperature and rate of snow fall, you may or may not be able to see a dim glow emanating from the clump of snow.



Flash Poll
Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

DIY Practical Joke Project Idea
Max Maxfield
8 comments
I just received a rather interesting email from a member of the EETimes community who prefers to remain anonymous. This message was as follows:

Jolt Judges and Andrew Binstock

Jolt Awards: The Best Books
Jolt Judges and Andrew Binstock
1 Comment
As we do every year, Dr. Dobb's recognizes the best books of the last 12 months via the Jolt Awards -- our cycle of product awards given out every two months in each of six categories. No ...

Engineering Investigations

Air Conditioner Falls From Window, Still Works
Engineering Investigations
2 comments
It's autumn in New England. The leaves are turning to red, orange, and gold, my roses are in their second bloom, and it's time to remove the air conditioner from the window. On September ...

David Blaza

The Other Tesla
David Blaza
5 comments
I find myself going to Kickstarter and Indiegogo on a regular basis these days because they have become real innovation marketplaces. As far as I'm concerned, this is where a lot of cool ...